package org.example.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.example.common.BaseContext;
import org.example.common.CustomException;
import org.example.entity.*;
import org.example.mapper.OrderMapper;
import org.example.service.*;
import org.example.service.ShoppingCartService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;


@Service
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {

    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private OrderDetailService orderDetailService;
    @Autowired

    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;

    @Override


    @Transactional
    public void submit(Orders orders) {
        Long uId= BaseContext.getCurrentId();
        LambdaQueryWrapper<ShoppingCart> lambdaQueryWrapper=new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(ShoppingCart::getUserId,uId);
        List<ShoppingCart> shoppingCarts=shoppingCartService.list(lambdaQueryWrapper);
        if (shoppingCarts==null||shoppingCarts.size()==0){
            throw new CustomException("购物车为空，不能下单");
        }
        User user= userService.getById(uId);

        AddressBook addressBook=addressBookService.getById(orders.getAddressBookId());
        if (addressBook==null){
            throw new CustomException("地址信息有误，不能下单");
        }


        long orderId= IdWorker.getId();
        AtomicInteger amount=new AtomicInteger(0);


        List<OrderDetail> orderDetails= shoppingCarts.stream().map((item)->{
            OrderDetail orderDetail=new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(uId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(orders);

        orderDetailService.saveBatch(orderDetails);

        shoppingCartService.remove(lambdaQueryWrapper);

    }
}
